A Mitral stenosis patient has developed pulmonary aery hypeension. Which of the following auscultatory findings may be heard?
**Core Concept**
Mitral stenosis is a valvular heart disease characterized by the narrowing of the mitral valve orifice, impeding blood flow from the left atrium to the left ventricle. The resulting increased pressure in the left atrium can lead to pulmonary hypertension, which in turn can cause various auscultatory changes.
**Why the Correct Answer is Right**
The correct auscultatory finding in this scenario is a tricuspid regurgitant murmur. This occurs due to the increased pressure in the right heart chambers, which stretches and eventually fails the tricuspid valve, leading to regurgitation. The murmur is typically a high-pitched, decrescendo diastolic murmur best heard at the left lower sternal border. The increased pressure in the right heart chambers also causes the tricuspid valve to become more prominent, making it a good auscultation site.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not relevant to the auscultatory findings in mitral stenosis with pulmonary hypertension.
* **Option B:** While a pulmonary ejection systolic murmur may be present in patients with pulmonary hypertension, it is not the most characteristic auscultatory finding in this scenario.
* **Option D:** A pericardial friction rub is not typically associated with mitral stenosis and pulmonary hypertension.
**Clinical Pearl / High-Yield Fact**
In patients with mitral stenosis, the development of pulmonary hypertension can lead to a characteristic "boxcar" or "square root" sign on the pulmonary artery pressure tracing, indicating the presence of right ventricular failure.
**Correct Answer:** C.